﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
using Windows.Storage.Streams;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234237

namespace Centny.TestPage
{
    /// <summary>
    /// A basic page that provides characteristics common to most applications.
    /// </summary>
    public sealed partial class TestReadFile : Centny.Common.LayoutAwarePage
    {
        public TestReadFile()
        {
            this.InitializeComponent();
        }

        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="navigationParameter">The parameter value passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
        /// </param>
        /// <param name="pageState">A dictionary of state preserved by this page during an earlier
        /// session.  This will be null the first time a page is visited.</param>
        protected override void LoadState(Object navigationParameter, Dictionary<String, Object> pageState)
        {
            VisualStateManager.GoToState(this.T1Border, "PointerOver", true);
            Button btn;
            ControlTemplate ct;
            ContentControl cc;
            Control ctrl;
            FrameworkElement fe;
            
            Border b;
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="pageState">An empty dictionary to be populated with serializable state.</param>
        protected override void SaveState(Dictionary<String, Object> pageState)
        {
        }
        private async void TestRf()
        {
            string filename = "ms-appx:///Assets/test.pdf";
            Uri baseUri = new Uri(filename);
            StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(baseUri);
            if (file != null)
            {
                IRandomAccessStream stream = await file.OpenAsync(FileAccessMode.Read);
                Stream fs = stream.AsStream();
                Random rd = new Random();
                long len = fs.Length;
                long startt = Timestamp();
                for (int i = 0; i < 10000; i++)
                {
                    long np = rd.Next((int)len);
                    fs.Position = np;
                    int b = fs.ReadByte();
                }
                await Task.Delay(1000);
                long endt = Timestamp();
                System.Diagnostics.Debug.WriteLine("time:" + (endt - startt));
            }
        }
        public static long Timestamp()
        {
            long ticks = DateTime.UtcNow.Ticks - DateTime.Parse("01/01/1970 00:00:00").Ticks;
            ticks /= 10000;
            return ticks;
        }
        private void Test_Click_1(object sender, RoutedEventArgs e)
        {
            TestRf();
        }

        private async void Test2_Click_1(object sender, RoutedEventArgs e)
        {
            long startt = Timestamp();
            String sss = "abcdefghijk";
            Random rd = new Random();
            for (int i = 0; i < 10000; i++)
            {
                char c = (char)rd.Next(0, 255);
                if (Char.IsWhiteSpace(c))
                {
                    continue;
                }
                if (sss.IndexOf(c) > 0)
                {
                    continue;
                }
            }
            //await Task.Delay(1000);
            long endt = Timestamp();
            System.Diagnostics.Debug.WriteLine("index time:" + (endt - startt));
        }
    }
}
